Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Main Group
C04B 5/00

Treatment of molten slag; Artificial stone from molten slag

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
Subclass:
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE

Additional Content

Manufacture of slag wool Treatment of slag in, or for the production of metals ,

Related Keywords

treatment of SLAG

2 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • C04B 5/02 Granulating; Dehydrating; Drying
  • C04B 5/06 Ingredients, other than water, added to the molten slag; Treatment with gases or gas generating material, e.g. to obtain porous slag

Top Applicants

Top 10 applicants by patent filingsfor class C04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 2,095
  2. WUHAN UNIVERSITY OF TECHNOLOGY 1,205
  3. NGK INSULATORS JP 1,133
  4. HALLIBURTON ENERGY SERVICES GROUP US 1,049
  5. SIKA TECHNOLOGY CH 1,041
  6. GUILIN UNIVERSITY OF TECHNOLOGY 807
  7. WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY 806
  8. SOUTHEAST UNIVERSITY 801
  9. CORNING US 777
  10. UNITED STATES GYPSUM COMPANY US 739